package duoTai.lapTop;

import java.sql.SQLOutput;

public class lapTop {
    public void powerOn(){
        System.out.println("开机");
    }
    public void powerOff(){
        System.out.println("关机");
    }
    public void useUsb(interfaceUsb usb){
        usb.on();
        usb.off();
    }
}
